brown



(No Model.) 1 2 Sheets-Sheet 2.4

R. G. BROWN.

SYNGHRONOUS TELEGRAPHY. No. 364,894. Patented June 14, 1887.

W/TNESSES: V 8 //vv/vr0/? Mr M N. PETERS. Phcmum m har. Washington. D. c.

UNITED STATES PATENT OFFICE.

ROBERT G. BROWN, OF BROOKLYN ASSIGNOR TO lHE STANDARD MULTIPLEX TELEGRAPH COMPANY, OF NEW YORK, N. Y.

SYNCHRONOUS TELEGRAPHY.

SPECIFICATION forming part of Letters Patent No. 364,894, dated June 14, 1887.

Application filed January 26, 1887.

T at whom) it may concern..-

Be it known that 1, ROBERT G. 'BEowN, of Brooklyn, in the county of Kings and State of New York, have invented an Improvement in Synchronous Telegraphy, of which the following is a specification.

In these improvements I make use of revolving arms, rotated with uniformity of speed and provided with trailers that are drawn over [(3 circles of segments, so that the trailers are simultaneously upon corresponding segments in the two synchronouslymoving instruments at the termini of the main line, and the segments are grouped together and connected to I 5 exterior local and line circuits to operate the instruments included in such circuits. Trailers and circles of segments of this character with the segments grouped together are represented in Letters Patent Nos. 286,281 and 316,126.

My present improvements are especially intended for operating printing telegraph-instruments in connection with the synchronously-moving and circuit-closing trailers, whereby numerous local circuits containing 2 printing-instruments can be put into commu nication over one main line without interfering with each other, and so that thetransmitting-instrumentat one end of the line may act in connection with the proper printinginstruo ment at the other end of the line, and the calls and signals made use of with printing telegraph-instrun1ents and circuits can be employed, and there is the necessary pause or lapse of time after the setting of the typewheel for the printing operation to take place, and should the key of the transmitting-instrument be held down the same letter will be printed a second time when the trailer in traveling over the sunflower again reaches the seg- 0 ment connected with that key; or, if a number of the transmittingkeys are held down simultaneously, the corresponding letters on the type-wheel will be printed in their regular order as the trailer comes iu contact successively 5 with the segments in the sunflower connected to the keys that are helddown, and it is nearly impossible to throw the instruments out of unison or to print a wrong letter, and this is true of all the printing-instruments and local circuits that may be connected with the circles Serial No. 225,520. (No model.)

of segments in the synchronous instruments at the respective ends of the line.

In the drawings I have represented in Figure 1 the circuit-connections at the two ends of a main line for one pair of printers. Figs. 3 2 and 3 illustrate modifications in the connections for accomplishing the same objects.

A and B represent the synchronous instruments connected together by the main line extending from one station to the other. Each .5 synchronousinstrument is provided with a revolving shaft, 0, an arm, D, extending therefrom, trailers 2 and 3 upon the arm, and two circular ranges of segments, 4 and 5. The inner circles of segments are intended to actuate 6 thetype-wheels locally from the terminal or main offices independently of the main line, while the outer circle of segments are for the purpose of effecting the printing by currents coming over the main line. In each circle of 73 segments there may be any desired numberfor instance, the circles having sixty segments may be adapted to ten local circuits with six segments to each circuit, the segments being connected up as indicated in the aforesaid 7 Patent No. 316,126.

' I have shown six segments of theinner circle connected to the branch wires, three of which are connected to one branch and three to the other branch, and six of the segments of the outer circle connected to a relay for effecting the printing and local circuits to the respective printing-instruments; but the number of segments connected together may be varied, and there may be any desired number of seg- 8 5 ments to compose the circle, but in all cases the segments connected together into one cir cuit are preferably equidistant all around the circle.

At R R, I have shown a reversing-relay, at 0 T R a'transmitting-relay, and atR a relay. M B represents the main battery, '1" B the transmitter-battery, L B a local battery, and R B a reversing-battery.

Referring to the connections shown in Fig. 9 5 1, the main line passes to the revolving shaft 0 and to the outer trailer, 2, for the segments 4. The local circuit, in which is included the local battery L B and the reversing-relay R R, which is preferably a differentially-wound po- 10o larized relay, starts from the inner trailer, 3, arm D, and wire to'stop l0, armature 60, local battery L B, and through the reversing-relay R R in one direction, and wire 11 to three of the connected segments 5, and through the reversing-rclay R R in the other direction, and wire 12 to the other three alternating segments, 5. The helices in this reversingrelay B R are wound in any desired manner, preferably differentially, so that when the current from LB passes through 60, 10, G D, and 3 to one of the segments 5 and the wire 12 to the relay R R the armature 14 will be swung in one direction, and when the current from L B passes through 60, 10, O D, 3 and one of the segments 5 and the wire 11 and through It R the armature 14 will be swung in the other direction, and this vibration of the armature 14 will be maintained by the action of the revolving trailer 3 and the arms D revolving synchronously in the instruments A and B, the armatures 14 at the two ends of the line will swing in exact unison, and will be continuously vibrated so long as the circuit and branches from the battery L B is not broken between and 10. The six segments on the outside circle are all grouped together and are connected by wire 36, through relay R and wire 35 to armature t, which is normally against its top stop, m.

The printirig-instruments are illustrated at F and H. These printing telegraph-instruments are to be of any desired character, but preferably the kind in-which the type-wheels and unison are actuated by clockwork and controlled by reversible currents. They may have two type-wheels with suitable mechanism for taking an impression from one or the other. This class of instrument is termed the stock quotation ticker, and is too well known to require additional explanation here.

I have represented an escapement-wheel at 16, and the escapement and armature at 17. Said armature 17 is preferably polarized, and is pulsated between the poles of the type-wheel magnets T M; and upon the shaft 18, that carries the eseapement-wheel 16, and the ordinary type-wheel (not shown in the drawing) is an arm and trailer, 19, that travels over a circle of segments, 20, (known as the sunflower,) corresponding in number to the characters on the type-wheel, and from each of the sunflowersegments a wire connects with a key upon the ordinary key-board K, and the contact-bar of the key-board is grounded at G.

The press-magnet is indicated at P M, and the lever that carries the printing-pad and armature is indicated at P. Upon this lever P is a spring, 22, which in its normal position rests against the stop 23, and this stop 23 is grounded through a key, 40, which is normally open, and the stop 23 also connected by a local line, 24:, running from the place where the printing-iustrument is located to the central station containing the synchronous instrument A or B, and there it is connected to the helix of the transmitting-relay T R, and thence to the battery T B and ground.

From the armature 14 the local-line wire 25 passes to the switch 26, contact 12 and through the type-wheel magnets T M, and through the press-magnet PM of the printing-instrument, and to the ground.

There is a call-bell and its magnet at L, and the circuit for the same passes from the switchcontact 28through the helix of L and a resistance, R It, to the ground.

Presuming that the parts are in the positions indicated in Fig. 1, and the armatures 14 are vibrating in unison at the two stations A B, currents pass from the reversing-batteries B B by either of the stops 30 or 31, over the armature l4 and the local line 25, and through T M and P M to the ground, the reversing-batteries R B also being grounded at G. In consequence of these pulsating and reverse cur rents passing over the local lines 25, thet-ypewheels of the two printing-instruments F and H will revolve in unison, but the press-magnet P M will not be actuated because its magnet is so constructed and its armature so adjusted as to be sluggish, as is usual in printing-instruments of this order. It, now, the operator at F depresses one ofhis keys,a circuit is closed from the ground through the key K, its wire and segment 20, and through the trailer 19, when it arrives at that segment, and by the wire 33, spring 22, stop 23, wire 24, helices of transmitting-relay T R, and battery T B to the ground. This instantly causes the transmitterarmature t to be drawn on its lower stop, 34, which is connected to one pole of the main battery M B, the other pole of which is grounded. The current from M B is thereby thrown on the main line through stop 34, armature t, relay R, wire 36, one of the segments 4, trailer 2, and arm D, and the relay R is thereby charged, attracting its armature 60 away from its back-stop 10. The circuit of the local battery L B and reversing-relay R R is thereby broken at 10, and the armature 14 remains against one of its stops 30 or 31. type-wheel stands still and the prolongation of contact with either of the batteries R B sufii cieutly charges the press-magnet P M to actuate its armature P to take the (lesiredimpression from the type-wheel. At the distant instrument B the current from M B over the line passes through 0, arm I), trailer 2, wire 36, relay R,wirc 35, lever i, and its top-stop, m, to ground, causing the armature 60 to separate from 10 and stop the pulsating of let, so that the type-wheel at H is also arrested, and the prolongation of contact causes the press-magnet P M to take the impression of the corresponding character of the type-wheel at the instrument H.

At station B the magnet T R is not brought into action because the keys at H are notaeted on, but at the instrument F the circuit from T B through 2t is broken at 23 by the downward movement of the press-lever P. Hence the armature it instantly flies back, thereby disconnecting the main battery M B from the segments 4. and main line, and the armatures of The IIS

both relays R close contact with their back stops 10, and the pulsation in the reversingrelays RB are-reestablished simultaneously, so that the press-magnets release their armatures and the type-wheels are again set in motion and so continue, and if a key, K, at F, is depressed, or several keys are depressed, the operations before described will take place successively as the trailer 19 closes contact with the segments of the sunflower in succession. tantstation'H) can at any time break the sender by depressing his calling-key 40 or any ofthe transmitting-keys, thereby sending impulses from they main battery at B to the transmittingstation through the relays R, which break up the message being printed there.

I wish to remark here that, supposing the trailers 2 are passing over one of their segments 4 and at that instant the main battery M B is cut off at 34, the probability is that the relay B at the distant station would not receive asufficient charge to actuate its armature, in which case the reversing-relayB Rat that distant station would fail to make a pause and the letter or character would not be printed; .but, in consequence of the contacts 22 23 being'controlled by the printing-lever, the main batteryis out off automatically during the time the trailer 2 is traveling between its segments and never when actually on a segment, thus effectually preventing the two printing telegraph -instruments losing their synchronous action from this cause and facilitating the rapid printing-of the characters by not being compelled to release one key before depressing another key to print the next character. These printing instruments are provided with unison-stops. (Not shown in the drawings.) They may be of-anydesired character. I prefer a unison in each that is brought into actionby about three revolutions of the type-whee1 and stops the further rotation until the unison-key is pressed and the movements of theprinting-levers at the two instruments simultaneously remove the unison-stops and allow the type-wheels to start off together and the unisons are not brought into. action unless the type-wheels are allowed to revolve several times without printing any characters. Unisons of this character are well known, and in my Patent No.-35S,379 such a unison is illustrated at U, Fig. 1.

The trailer 2 is preferably adjusted on the arm D in advance, in a radial line, through the trailer 3, so that the trailer 2 reaches its segment before the trailer 3 reaches its segment, the object being to give the magnet R sufiicient time to attract its armature 60 away from its back-post 10, so that when the trailer 3 reaches its corresponding segment the local circuit in which is included the reversing-relay R R is open at the armature 60 and post 10. Consequently the reversing-relay R B is not actuated, and its armature 14 remains against the stop 30 or 31, on which it was last thrown.

The receiving-operator (at the dis-- I put a condenser, 0 in a shunt around the magnet B to prolong the magnetism of the same sufficiently to insure a positive break in the local circuit at 10.

'WVhen the printing-instruments are not in action, the switch 26 is to be turned to the contact 28, and the current will pass through the call or signal L; but the resistance vR h is tobe sufficient to prevent the batteries R B being consumed and the call will not be rung, as the pulsations of opposing polarity follow each other too rapidly to allow the bell-magnet time to be sufticiently energized; but when apart at one station desires to call up the distant station the key 40 is closed and opened thereby, the battery T B is placed in circuit through transmitter T R, whose armature t places the main battery M B on the line, the pulsations from which, through the relays B at both stations, cause their armatures 60 to make and break the local circuits at and cause the pulsations from It B over 25 to be prolonged sufficiently to ring the alarms or calls L. Both persons place their switches 26 so as to close the circuits 25 through T M, the printing-instruments run to unison and stop, and the sender starts them simultaneously by depressing the ordinary unison-key in the transmitter K.

I have shown a rheostat, R hflin a shunt around TM P M, the resistance of which is to be sufficient to insure the proper action of the currents in T M P M. The object of the shunt is to prevent sparking between the armature that sparks will not be developed by the discharge of the magnets T M P M when the circuit is broken at 30 or 31, because there is a metallic shunt around such magnets containing the resistance R h The devices shown in Fig. 2 correspond to those before described except in two particulars. The local circuit, in which is included the reversingrelay R R, is opened and closed by the trailer 2 and its segments only, in consequence of which the armature let vi brates back and forth uniformly whether letters are printed or not. The printing is effected by shunting out a resistance, R h normally in the local line,which causes an increaseof energy sufficient to actuate the printing-magnet, as follows: WVhen the circuit from T B through T R and 24 isclosed by depressing one of the keysin the transmittinginstrument, the mainline circuit from the main battery M B is closed through 34 and t, and the wires 35 R and 36 and the armature is drawn away from the backstop 10, breaking the local circuit containing the local battery 62 and the helix of the magnet B, so that the armature 64. fliesbaclnclosingashunt at this stop 65 around the resistance R h, which allows the current R B to pass without extra resistance through the wire 25 to the printing-instrument for sufficiently energizing the press-magnet to more the printing-lever P. These movements are necessarily instantaneous, so that the printing 14 and its contacts 30 31, it being understood is effected before the trailers 2 and 3 reach their next contact segments in the groups of segments, so that the entire movement of the press-lever takes place before the pulsating circuit from R B is reversed.

In Fig. 3 two distinct and indepemlent features are illustrated. In the first the local battery L B is divided into two parts and placed in the branch circuits 11 and 12, so as to send alternating, positive, and negative currents through the reversing-relay 1t R, which in this case is wound in the ordinary way, throwing the armature 14 first one way and then the other. The second featureillustrates the manner of connecting what is technically known as a pole-changer, 74, which may be utilized with any of the plans here shown, and by means of which but one reversingbattery, 1t B, is required, the positive and negative poles of which are alternately put to the local line and to earth, and are of equal strength. The magnet R and polechanger 7-1; is actuated by the local battery 72 and armature and stop of the reversingrelay R R.

In all of the connections shown herein the currents on the local circuits from the synchronous instruments to thepri ntirig-instruments are pulsated, of reverse polarity, through the helices of the printers by the vibration of the armature 14, and these local currents are in dependent of any main-line currents, so that there is little or no risk of error in the actuation of the type-wheels from failure in the current sent over the main line. The main-line current has nothing to do in maintaining the unison of the distant printing-instruments, as they are kept in action by the respective synchronous instruments, and the main-line currents have only to cause those printing-instruments to perform the printing,and the unison of the printers is not interfered with by momentary grounding, breaking, or interrupting the main line.

A condenser, 51, may be used, as shown in Fig. 3, in a shunt around the printerin place of the resistance R 7r, Fig. 1.

- I claim as my invention The combination, with synchronouslymoving trailers and circles of segments and the line-circuit, of printing telegraph-instruments, localline-wires, reversirig-batteries, and circuit-changing armatu res, a reversing-relay, and branch local circuits to the trailers for actuating the circuit-changing :n'matures,substantially as set forth.-

2. The combination, with circles of segments and the circuit connections for the same and synchronously-moving trailers and a line-circuit, of a reversing-relay, a local battery and branch circuits through the reversing-relays to the circles of segments, a reversing-battery and armature, a printing telegraph-instrument the magnets of which are in a circuit of the reversing-battery and armature, and a relay with its armature in the cir- I cuit of the local battery and its branches,

whereby the pulsations to the printing instrument are arrested by the movement of the relay-armature breaking the local circuit to the synehronously-moving trailer, substantially as set forth.

3. The combination, with synchronouslymoving trailers and their segments and branch circuit-connections to the segments, a reversing-magnet, and local battery, of an armature to the reversingmagnet, a circuit passing through the same, a reversing-battery, a printing-instrument, and transmitter-keys and local line-circuit from the reversing-battery to the type-wheel an d' press-magnets, a main battery, line-circuit, and a transmitting-relay and its battery and circuit passing through the keys of the transmitter, whereby the printing-lever is brought into action by the transmitting-relay, substantially as set forth.

4. The combination of two synchronouslymoving arms and trailers, the circles of segments for the same, and the circuit-connections, two printing telegraphinstruments and their transmitter-keys, reversing-batteries, their 10- cal circuit-colmcctions through the printinginstruments, reversing-relays and their armatures in the reversing-circuits, local batteries with their branch circuit-connections to one set of the circles of segments, relays with their armatures to make and break the local branch circuits, and the main battery and line circuit passing through the relay and the other sets of segments and a local-line circuit and trans mitting-battcry to the keys of the printer, and a transmitting-relay for placing the main battery on line and effecting the printing, substantially as set forth.

In a printing telegraph instrument adapted to use with synchronouslymoving instruments and a line-circuit, the combination, with the type-wheel and impression-magnets, of a trailer and arm upon the type-wheel shaft, the sunflower contacts, the range of transmitting-keys and the circuiteouneetions, and a local line'eircuit transmitting-relay and battery, and a circuitbreaker upon the printing mechanism to break the local line-circuit and demagnetize the transn'iitting-relay when the printing mechanism is moved,substantially as set forth.

ti. The combination, with a synchronouslymoving arm and two trailers, of two circles of segments, the circuit-connections to segments forming groups, a local battery and the branch circuit-connections to one circle of segments, and a reversing-relay in such local and branch circuits, a line, amain battery, circuit-cornice tions from the same to the other circle of segments, and a relay with its armature in the circuit of the main battery, and telegraphic transmitting and receiving instruments in circuits connected with the relay and the reversing-relay, substantially as set forth. I

7. The combination, with the synchronous instruments and circles of segments, of a reversing-rclay, local batteries and branch circuits for the same, av relay with its armature Signed by me this 22d day of January, A. D.

and stop in the local circuit, a battery and 1887.

circuit passing through the relay, and a shunt to the relay and a condenser in the shunt, N 5 whereby the condenser prolongs the break in WVitnesses:

the local branch circuits containing the re- GEO. T. PINOKNEY,

versing-relay, substantially as set forth. WILLIAM G. Mo'r'r. 

